Official 1981-2010 Climate Normals

City: PRAIRIE DU ROCHER
State: IL
ID: 116973
Latitude: 38.0886
Longitude: -90.1619
Elevation:  403.8 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    2.30   2.39   3.44   3.82   5.13   3.61   4.12   3.31   3.48   3.52   4.09   3.20
Snow:     3.3    3.2    0.7    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.3    1.8

Number of Days
P001:     6.1    7.1    9.8   10.8   11.4    9.2    8.2    7.1    6.9    8.3    8.8    8.5
P010:     3.9    4.9    6.8    7.4    8.3    6.6    5.7    5.2    4.8    6.2    6.2    6.2
P100:     0.2    0.5    0.6    0.8    1.3    0.8    1.3    0.9    1.3    1.1    1.4    0.9
S001:     1.7    1.6    0.4    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.2    1.0
S010:     1.1    1.2    0.3    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.1    0.9
S100:     0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0
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Annual Values

Precipitation:   42.41 inches
     Snowfall:     9.4 inches

   Days precipitation at or above 0 inches (P000):   102.2
Days precipitation at or above 0.10 inches (P010):    72.2
Days Precipitation at or above 1.00 inches (P100):    11.1
      Days Snowfall at or above 0.1 inches (S001):     5.0
      Days Snowfall at or above 1.0 inches (S010):     3.7
     Days Snowfall at or above 10.0 inches (S100):     0.1

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KEY:
High - average daily high temperature, degrees F
Mean - average daily mean temperature, degrees F
Low - average daily low temperature, degrees F
CDD - cooling degree days, base 50F
HDD - heating degree days, base 50F
T090 - number of Days with Temperatures above 90 degrees F
T100 - number of Days with Temperatures above 100 degrees F
T000 - number of Days with Temperatures below 0 degrees F
T032 - number of Days with Temperatures below 32 degrees F
Prcp - precipitation, inches
Snow - snowfall, inches
P001 - number of Days with Precipitation of 0.01 inches or more
P010 - number of Days with Precipitation of 0.10 inches or more
P100 - number of Days with Precipitation of 1.00 inches or more
S001 - number of Days with Snowfall of 0.1 inches or more
S010 - number of Days with Snowfall of 1.0 inches or more
S100 - number of Days with Snowfall of 10.0 inches or more

Page Source:
Dr. Jim Angel, State Climatologist
Illinois State Water Survey
Prairie Research Institute
University of Illinois

Data Source:
NOAA National Climatic Data Center